15243507057878 has 32 divisors (see below), whose sum is σ = 25262177391360. Its totient is φ = 6841013004000.

The previous prime is 15243507057853. The next prime is 15243507057881. The reversal of 15243507057878 is 87875070534251.

It is a self number, because there is not a number n which added to its sum of digits gives 15243507057878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13216658 + ... + 14323653.

It is an arithmetic number, because the mean of its divisors is an integer number (789443043480).

Almost surely, 2^{15243507057878} is an apocalyptic number.

15243507057878 is a deficient number, since it is larger than the sum of its proper divisors (10018670333482).

15243507057878 is a wasteful number, since it uses less digits than its factorization.

15243507057878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27540644.

The product of its (nonzero) digits is 65856000, while the sum is 62.

The spelling of 15243507057878 in words is "fifteen trillion, two hundred forty-three billion, five hundred seven million, fifty-seven thousand, eight hundred seventy-eight".